See this page for adding the code
command so VSCode can be launched from terminal:
code some_directory
Control + [Tab number]
Usually you can Cmd + Click or use F12
Preferences > Keyboard Shortcut > workbench.action.navigateBack:
Cntrl + -
Preferences > Keyboard Shortcut > workbench.action.gotoSymbol:
Cmd + Shift + O(optionally then type ':')